In this paper one of the procedures proposed in literature for the design of viscous dampers to be inserted in existing buildings is examined and extended to 3D eccentric buildings. This procedure is based on an energy criterion for the determination of the damping ratio and accounts for the nonlinear behaviour of the structure through pushover analysis. The proposed procedure has been verified through a case study characterized by a six storey RC building dimensioned only for gravity loads and rehabilitated with fluid-viscous dampers. Both plansymmetric and plan-asymmetric configurations have been considered for comparisons. The second one has been analysed both with the procedure proposed in literature for plan buildings, and with the extended one. Moreover, the importance of considering the higher modes has been investigated. The effectiveness of the design procedure has been then evaluated through the comparison with nonlinear dynamic analyses.
A Procedure for the Design of Viscous Dampers to Be Inserted in Existing Plan-Asymmetric Buildings / L. Landi; P. P. Diotallevi; G. Castellari. - ELETTRONICO. - (2012), pp. 4456.1-4456.10. (Intervento presentato al convegno 15th World Conference on Earthquake Engineering (15WCEE) tenutosi a Lisbon (Portugal) nel 24-28 September 2012).
A Procedure for the Design of Viscous Dampers to Be Inserted in Existing Plan-Asymmetric Buildings
LANDI, LUCA;DIOTALLEVI, PIER PAOLO;
2012
Abstract
In this paper one of the procedures proposed in literature for the design of viscous dampers to be inserted in existing buildings is examined and extended to 3D eccentric buildings. This procedure is based on an energy criterion for the determination of the damping ratio and accounts for the nonlinear behaviour of the structure through pushover analysis. The proposed procedure has been verified through a case study characterized by a six storey RC building dimensioned only for gravity loads and rehabilitated with fluid-viscous dampers. Both plansymmetric and plan-asymmetric configurations have been considered for comparisons. The second one has been analysed both with the procedure proposed in literature for plan buildings, and with the extended one. Moreover, the importance of considering the higher modes has been investigated. The effectiveness of the design procedure has been then evaluated through the comparison with nonlinear dynamic analyses.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
